diff --git a/documentation/webdocs/markdowndocs/Connector.md b/documentation/webdocs/markdowndocs/Connector.md
index 2ecb14c71077abff4f412fc4bc06a56d4459c306..014e88de42df7309d8d6b3aa9b9d0448374edd52 100644
--- a/documentation/webdocs/markdowndocs/Connector.md
+++ b/documentation/webdocs/markdowndocs/Connector.md
@@ -345,7 +345,7 @@ c1.execute('select * from tb')
 data = c1.fetchall()
 # data is a list of returned rows with each row being a tuple
 numOfRows = c1.rowcount
-numOfCols = c1.descriptions
+numOfCols = len(c1.description)
 for irow in range(numOfRows):
   print("Row%d: ts=%s, temperature=%d, humidity=%f" %(irow, data[irow][0], data[irow][1],data[irow][2])
   
diff --git a/documentation/webdocs/markdowndocs/connector-ch.md b/documentation/webdocs/markdowndocs/connector-ch.md
index f4151676e63c7af4a609d72cce545e70ac951e1f..a2a9161ce783c0ddf34cd343bce28c9c0c6284d9 100644
--- a/documentation/webdocs/markdowndocs/connector-ch.md
+++ b/documentation/webdocs/markdowndocs/connector-ch.md
@@ -341,7 +341,7 @@ c1.execute('select * from tb')
 data = c1.fetchall()
 # 返回的结果是一个列表，每一行构成列表的一个元素
 numOfRows = c1.rowcount
-numOfCols = c1.descriptions
+numOfCols = len(c1.description)
 for irow in range(numOfRows):
   print("Row%d: ts=%s, temperature=%d, humidity=%f" %(irow, data[irow][0], data[irow][1],data[irow][2])